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我是 ruby​​ on rails 的新手，尤其是嵌套形式。我正在尝试以相同的形式创建一个作者和一本书，知道它们之间存在多对多的关系，我的代码如下所示。书本.rb

class Book < ActiveRecord::Base
has_many :exemplaires
has_many :talks, inverse_of: :book
has_many :subjects, through: :writings
has_many :writings
has_many :authors, through: :talks
accepts_nested_attributes_for :authors
validates :title, presence: true

end

作者.rb：

class Author < ActiveRecord::Base
 has_many :talks
 has_many :books, through: :talks
end

谈话.rb

class Talk < ActiveRecord::Base
 belongs_to :book
 belongs_to :author
end

book_controller.rb

class BooksController < ApplicationController

  def index

 end
 def list
   @books= Book.all
 end
 def new
   @book = Book.new
   @author=@book.authors.new
 end
 def create
    @book= Book.new(book_params)
    if @book.save
     flash[:notice]='goood'
     redirect_to admin_manage_path
    else
     flash[:alert]='ouups'
     redirect_to root_url
    end
  end



  private

  def book_params
   params.require(:book).permit(:title, :pages, :resume, :authors_attributes)
  end
  end

书籍\new.html.erb

<h1>Add new book</h1>
  <%= form_for(@book) do |form| %>
     <%= form.label :title %>
     <%= form.text_field :title %>
     <%= form.fields_for :authors do |tag_form| %>

       <%= tag_form.label :f_name %>
       <%= tag_form.text_field :f_name %>
    <% end %>

   <%= form.submit "Submit" %>
 <% end %>

我得到的错误

BooksController#create 作为 HTML 参数处理：{"utf8"=>"✓", "authenticity_token"=>"qpGng8tOiC/B5VX2tphuhAe+Wq1vx7it1vEO6XmwZmI=", "book"=>{"title"=>"boooooooooooooook", "authors_attributes "=>{"0"=>{"f_name"=>"auuuuuuuuuuuuuuuuuthor"}}}, "commit"=>"Submit"} 不允许的参数：authors_attributes

4

1 回答 1

1

您还需要将这些authors_attributes字段列入白名单：

  def book_params
   params.require(:book).permit(:title, :pages, :resume, authors_attributes: [:f_name])
  end
于 2014-10-26T21:14:45.723 回答